Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
Biasing of P-N Junction01:16

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity arises...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Janus Au Nanostructure-Empowered Cathodic Photoelectrochemical Analysis: Plasmon-Activated Signaling Cascade Amplification Coupled with Sensing Interface Engineering.

Analytical chemistry·2026
Same author

Ionic Liquids Functionalized PEDOT:PSS Channel: An Ideal Strategy for Both Accumulation and Depletion Mode OPECT Devices.

Analytical chemistry·2026
Same author

Mn-Induced Support Stabilization and Ir Electronic Activation Enable Acid-Stable, Low-Loading IrO<sub>2</sub> Water Oxidation.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Supramolecules for Pathogen Inhibition: From Polymers to Self-Assembled Nanosystems.

Accounts of materials research·2026
Same author

Structurally disordered CoS<sub>x</sub>-Co(OH)<sub>2</sub> heterointerface for boosting alkaline hydrogen evolution reaction.

Journal of colloid and interface science·2026
Same author

Hollow-Structured CNQDs@CTP Z-Scheme Heterojunctions for the Construction of a PEC Sensing Platform: High-Sensitivity Detection of PFOA in Water.

Analytical chemistry·2026

Related Experiment Video

Updated: Jul 6, 2026

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
10:44

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

Heterojunction Gate-Empowered OPECT Aptasensing: A Valid Protocol for Realizing High Current Gain at Low Electron

Lan Li1, Wanting Xie1, Liye Wu1,2

  • 1School of Agricultural Engineering, Jiangsu University, Key Laboratory of Modern Agricultural Equipment and Technology (Ministry of Education), Zhenjiang, Jiangsu 212013, P. R. China.

Analytical Chemistry
|July 4, 2026
PubMed
Summary

Organic photoelectrochemical transistors (OPECTs) achieve high current gain using a novel heterojunction gate. This strategy enhances device stability and performance, even with low electron donor concentrations like ascorbic acid.

More Related Videos

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
11:17

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

Published on: February 10, 2014

Related Experiment Videos

Last Updated: Jul 6, 2026

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
10:44

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
11:17

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

Published on: February 10, 2014

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Organic photoelectrochemical transistors (OPECTs) require high electron donor concentrations for optimal performance.
  • This reliance limits device stability and operational lifetime.
  • Developing OPECTs that function effectively under low donor conditions is crucial.

Purpose of the Study:

  • To engineer a heterojunction gate for OPECTs to achieve high current gain with low electron donor concentrations.
  • To investigate the interfacial charge transfer mechanisms and gating effects of the heterojunction gate.
  • To demonstrate the OPECT system's application in aptasensing for environmental contaminants.

Main Methods:

  • Fabrication of an OPECT device utilizing a MnIn2S4-ZnIn2S4 heterojunction gate.
  • Systematic characterization of the heterojunction gate's performance.
  • Integration of theoretical analysis to understand interfacial charge transfer.
  • Validation of the OPECT system for aptasensing of nonylphenol.

Main Results:

  • Achieved a current gain of up to 3 orders of magnitude with 1 mM ascorbic acid (AA).
  • Demonstrated superior device performance compared to devices with pure MnIn2S4 or ZnIn2S4 gates.
  • Confirmed the effectiveness of the heterojunction engineering strategy in enhancing photoelectric conversion efficiency.
  • Successfully validated the OPECT system for detecting nonylphenol in water samples.

Conclusions:

  • Heterojunction engineering of OPECT gates significantly enhances current gain under low electron donor conditions.
  • The developed OPECT system offers improved stability and extended operational lifetime.
  • This approach provides a promising pathway for next-generation high-performance OPECT sensing technologies.